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公开(公告)号：US20250102358A1
公开(公告)日：2025-03-27
申请号：US18884192
申请日：2024-09-13
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Tatsuo DOUGAKIUCHI
Abstract: A spectroscopic analyzer according to an embodiment includes: a Fabry-Perot QCL element configured to emit a laser light including a plurality of mode lights respectively corresponding to a plurality of modes indicating a discrete oscillation spectrum; a diffraction grating configured to disperse the laser light emitted from the QCL element into the plurality of mode lights; and a light detector configured to detect the mode light dispersed by the diffraction grating and then transmitted through a sample.
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公开(公告)号：US20230307562A1
公开(公告)日：2023-09-28
申请号：US18023418
申请日：2021-05-26
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Tatsuo DOUGAKIUCHI , Akio ITO , Masahiro HITAKA , Tadataka EDAMURA
IPC: H01L31/0352 , G01J3/45 , G01J3/457 , G01J3/10 , H01L23/482 , H01L31/02 , H01L31/0232 , H01L31/0304
CPC classification number: H01L31/035236 , G01J3/45 , G01J3/457 , G01J3/10 , H01L23/4821 , H01L31/02005 , H01L31/02325 , H01L31/035281 , H01L31/03046 , G01J2003/102
Abstract: A photodetector includes: a semiconductor substrate; a mesa portion formed on a major surface of the semiconductor substrate to extend along an optical waveguide direction; a first contact layer; a second contact layer; a first electrode; and an air bridge wiring electrically connected to the first contact layer and the first electrode. When viewed in a direction perpendicular to the major surface of the semiconductor substrate, a length of the mesa portion in the optical waveguide direction is longer than a length of the mesa portion in a direction perpendicular to the optical waveguide direction. The air bridge wiring is led out from the first contact layer to one side in the direction perpendicular to the optical waveguide direction, and is bridged between the first contact layer and the first electrode.
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公开(公告)号：US20220311215A1
公开(公告)日：2022-09-29
申请号：US17701899
申请日：2022-03-23
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Akio ITO , Kazuue FUJITA , Shohei HAYASHI , Tatsuo DOUGAKIUCHI
Abstract: A quantum cascade laser includes a semiconductor substrate, an optical waveguide formed on a first surface of the semiconductor substrate, and a temperature adjusting member. The optical waveguide includes a first region and a second region located on one side with respect to the first region in the optical waveguide direction of the optical waveguide. The first region generates a first light having a first wavelength, and the second region generates a second light having a second wavelength. The optical waveguide generates an output light having a frequency corresponding to a difference between the first wavelength and the second wavelength by difference-frequency generation. A recess for suppressing heat transfer between the first region and the second region is formed at a second surface of the semiconductor substrate. The temperature adjusting member includes a first temperature adjusting member for adjusting the temperature of the second region.
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Patent Agency Ranking
公开(公告)号：US20190052058A1
公开(公告)日：2019-02-14
申请号：US16051547
申请日：2018-08-01
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Tadataka EDAMURA , Atsushi SUGIYAMA , Tatsuo DOUGAKIUCHI
IPC: H01S5/14 , H01S5/34 , H01S5/0625
Abstract: An external resonance type laser module includes a quantum cascade laser, a MEMS diffraction grating configured to include a diffraction/reflection portion configured to diffract and reflect light emitted from the quantum cascade laser and return a part of the light to the quantum cascade laser by swinging the diffraction/reflection portion, and a controller configured to control driving of the quantum cascade laser. The controller is configured to pulse-drive the quantum cascade laser such that pulsed light of a second frequency higher than a first frequency at which the diffraction/reflection portion swings is emitted from the quantum cascade laser and a phase of the pulsed light changes each time the diffraction/reflection portion reciprocates m times (m: an integer of 1 or more).
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公开(公告)号：US20190011361A1
公开(公告)日：2019-01-10
申请号：US16021055
申请日：2018-06-28
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Tatsuo DOUGAKIUCHI , Akio ITO , Kazuue FUJITA , Tadataka EDAMURA
CPC classification number: G01N21/39 , G01N2021/391 , G01N2021/451 , H01L31/035236 , H01S5/0028 , H01S5/0203 , H01S5/0208 , H01S5/0264 , H01S5/0656 , H01S5/10 , H01S5/12 , H01S5/141 , H01S5/143 , H01S5/2027 , H01S5/22 , H01S5/3401 , H01S5/34313
Abstract: A fluid analyzer includes a substrate, a quantum cascade laser formed on a surface of the substrate and including a first light-emitting surface and a second light-emitting surface facing each other in a predetermined direction parallel to the surface, a quantum cascade detector formed on the surface and including the same layer structure as the quantum cascade laser and a light incident surface facing the second light-emitting surface in the predetermined direction, and an optical element disposed on an optical path of light emitted from the first light-emitting surface across an inspection region in which a fluid to be analyzed is to be disposed and reflecting the light to feed the light back to the first light-emitting surface.
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公开(公告)号：US20170115213A1
公开(公告)日：2017-04-27
申请号：US15294882
申请日：2016-10-17
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Akio ITO , Tatsuo DOUGAKIUCHI , Tadataka EDAMURA
CPC classification number: G01N21/39 , G01N2021/399 , H01S5/0264 , H01S5/22 , H01S5/3401 , H01S2301/176
Abstract: A fluid analyzer includes a substrate, a quantum cascade laser formed on a surface of the substrate and including a first light-emitting surface and a second light-emitting surface facing each other, a first quantum cascade detector formed on the surface and including the same layer structure as the quantum cascade laser and a first light incident surface facing the first light-emitting surface, a second quantum cascade detector formed on the surface and including the same layer structure as the quantum cascade laser and a second light incident surface facing the second light-emitting surface, and a resin member covering at least the second light-emitting surface and the second light incident surface and having optical transparency and an electrical insulation property. A first space in which a fluid to be analyzed is disposed is provided in a first area between the first light-emitting surface and the first light incident surface.
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公开(公告)号：US20170063038A1
公开(公告)日：2017-03-02
申请号：US15253382
申请日：2016-08-31
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Akio ITO , Tatsuo DOUGAKIUCHI , Kazuue FUJITA , Tadataka EDAMURA
CPC classification number: H01S5/142 , H01S5/0207 , H01S5/0604 , H01S5/1092 , H01S5/12 , H01S5/24 , H01S5/3402 , H01S2302/02
Abstract: A quantum cascade laser is configured with a semiconductor substrate, and an active layer having a multistage lamination of emission layers and injection layers. The active layer is configured to be capable of generating first pump light of a frequency ω1 and second pump light of a frequency ω2, and to generate output light of a difference frequency ω by difference frequency generation. An external diffraction grating is provided for generating the first pump light, outside an element structure portion including the active layer, and an internal diffraction grating is provided for generating the second pump light, inside the element structure portion. The frequency ω2 is set to be fixed to a frequency not coincident with a gain peak, and the frequency ω1 is set to be variable to a frequency different from the frequency ω2.
Abstract translation: 量子级联激光器配置有半导体衬底，以及具有发射层和注入层的多级叠层的有源层。 有源层被配置为能够产生频率ω1的第一泵浦光和频率ω2的第二泵浦光，并且通过差频产生产生差频ω的输出光。 提供外部衍射光栅，用于在包括有源层的元件结构部分外部产生第一泵浦光，并且在元件结构部分内部设置内部衍射光栅以产生第二泵浦光。 频率ω2被设定为固定为与增益峰值不一致的频率，频率ω1被设定为可变至不同于频率ω2的频率。
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公开(公告)号：US20170033536A1
公开(公告)日：2017-02-02
申请号：US15193249
申请日：2016-06-27
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Kazuue FUJITA , Akio ITO , Tadataka EDAMURA , Tatsuo DOUGAKIUCHI
CPC classification number: H01S5/2018 , H01S5/0604 , H01S5/1096 , H01S5/18 , H01S5/24 , H01S5/3402 , H01S5/34306 , H01S2302/02
Abstract: A quantum cascade laser is configured with a semiconductor substrate, and an active layer provided on a first surface of the substrate and having a cascade structure in the form of a multistage lamination of unit laminate structures each of which includes an emission layer and an injection layer. The active layer is configured to be capable of generating first pump light of a frequency ω1 and second pump light of a frequency ω2 by intersubband emission transitions of electrons, and to generate output light of a difference frequency ω by difference frequency generation from the first pump light and the second pump light. Grooves respectively formed in a direction intersecting with a resonating direction in a laser cavity structure are provided on a second surface opposite to the first surface of the substrate.
Abstract translation: 量子级联激光器被配置为具有半导体衬底和设置在衬底的第一表面上的有源层，并且具有层叠结构的级联结构，该级联结构是单位层叠结构的多级叠层形式，每层包括发射层和注入层 。 有源层被配置为能够通过电子的子带间发射跃迁来产生频率ω1的第一泵浦光和频率ω2的第二泵浦光，并且通过来自第一泵的差频产生产生差频ω的输出光 光和第二个泵灯。 在与基板的第一表面相对的第二表面上设置分别在与激光腔结构中的谐振方向相交的方向上形成的槽。
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